astronomy

n.天文学

astonishing, astonishingly, astonishment, astound, astounding, astrakhan, astral, astray, astride, astringency, astringent, astro-, astrolabe, astrologer, astrological, astrology, astronaut, astronautics, astronomer, astronomical, astrophysics, astute, astutely, astuteness, asunder, Aswan Dam, asylum, asymmetric, asymmetrical, asymmetry, asynchronous, at, at (the) best, at (the) worst, at a disadvantage, at a good pace, at a guess, at a loss, at a speed of, at a stretch,